The void size function in dynamical dark energy cosmologies

Verza, Giovanni; Pisani, Alice; Carbone, Carmelita; Hamaus, Nico und Guzzo, Luigi (2019): The void size function in dynamical dark energy cosmologies. In: Journal of Cosmology and Astroparticle Physics, Nr. 12, 040

Abstract

We test a theoretical description of the void size distribution function against direct estimates from halo catalogues of the DEMNUni suite of large cosmological simulations. Besides standard Lambda CDM, we consider deviations of the dark energy equation of state from w = -1, corresponding to four combinations in the popular Chevallier-Polarski-Linder parametrisation: w(0) = -0.9;-1.1, w(a) = 0.3;0.3. The theoretical void size function model, relying on the Sheth & van de Weygaert double barrier excursion set formalism, provides an accurate description of the simulation measurements for the different dark energy models considered, within the statistical errors. The model remains accurate for any value of the threshold for void formation delta(v). Its robust consistency with simulations demonstrates that the theoretical void size function can be applied to real data as a sensitive tool to constrain dark energy.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 1475-7516
• Sprache: Englisch